Hi Dave,
 
Dadabass is correct. The picture with the yellow & green arrows. They are the instructions for increasing the output.  
 
Two simple resistors, and what a HECK of an increase too! Just gigged with it for the first time tonight...Amazing....I'm sure in the future someone may have the same situation. I just thought it would be great for the archives.

Done.

Thank's Dave,  
 
Very kind of you!